Fixed support for sources that are actually recompiled.

Author: grigorye

lib/slather/coverage_info.rb

@@ -72,8 +72,11 @@ def rate_branches_tested
 
     def source_file_pathname_relative_to_repo_root
       test_path=source_file_pathname
-      if ENV["COVERAGE_PATH_EQUIVALENCE"]
-        test_path=Pathname("." + "#{source_file_pathname}".delete_prefix(ENV["COVERAGE_PATH_EQUIVALENCE"].delete_suffix(",.")))
+      equivalence=ENV["COVERAGE_PATH_EQUIVALENCE"]
+      if equivalence
+        if "#{source_file_pathname}".start_with?(equivalence)
+          test_path=Pathname("." + "#{source_file_pathname}".delete_prefix(equivalence.delete_suffix(",.")))
+        end
       end
       test_path.realpath.relative_path_from(Pathname("./").realpath)
     end